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Note: For this assignment, use the sample you collected for Assignment 1 Problems: Note: All problems are independent of each other, unless otherwise indicated. This means that you must show a complete solution for each problem. 1. (25 points) Using the traditional method, test a claim about the mean of your population at a 0.05 level of significance. 2. (25 points) Using the traditional method, test a claim about the standard deviation of your population at a 0.05 level of significance 3. (25 points) Repeat Problem 1 using the p-value method. 4. (25 points) Repeat Problem 2 using the p-value method. Note: Data from assignment one is below. Sample Number= 31 ? (sample score)=4559 Sample Mean= 147.06 Standard Deviation= 44.70 CV= 44.70/147.06= 0.31 (after rounding up??) Traditional Method 1. State the null hypotheses. 2. State the alternate hypothesis. 3. State the significance level. 4. Find the critical value(s) CV. 5. Compute the test statistic TS. 6. Make a decision. 7. State conclusion. P-value Method 1. State the null hypotheses. 2. State the alternate hypothesis. 3. State the significance level. 4. Compute the test statistic TS. 5. Find p-value 6. Make a decision. 7. State conclusion Computing p-value for t-test using MS EXCEL: Steps 1. In EXCEL, click any cell (ie, A1 cell). 2. Depending on your hypothesis test, type one of the formulas shown below: =tdist(-t,df,1) for left-tail test =tdist(t,df,1) for right-tail test =tdist(t,df,2) for two-tail test Notes 1. EXCEL has different notation for t and df. 2. Don't forget to start a formula with an "=" sign. 3. The p-value cannot be negative or greater than 1. Computing p-value for Chi-Square test using MS EXCEL: Steps 1. In EXCEL, click any cell (ie, A1 cell). 2. Depending on your hypothesis test, type one of the formulas shown below: =1-chidist(?2,df) for left-tail test =chidist(?2,df) for right-tail test =2*(1-chidist(?2,df)) for two-tail test if ?2 falls near left tail. =2*chidist(?2,df) for two-tail test if ?2 falls near right tail. Notes 1. EXCEL has different notation for ?2 and df. 2. Don't forget to start a formula with an "=" sign. 3. The p-value cannot be negative or greater than 1.

Paper#11473 | Written in 18-Jul-2015

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